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/***************************************************************
WARSHALL.C
This file containts TRANSITIVE CLOSURE routines of ZUBR.
PART OF : ZUBR - Parsers generator for multiple syntax
language compilers .
COMPILE : .
NOTE : NONE .
Copyright (C) 1995 - 2026 by Andrey V.Kosteltsev.
All Rights Reserved.
***************************************************************/
/*
This file contant RUSSIAN letters( code-page: UTF-8 )
***************************************************************/
#include <defs.h>
#ifndef __NO_COMPILE
void transitive_closure( unsigned *R, int n )
/***************************************************************
Description : transitive_closure()
Concepts :
Use Global Variable:
Use Functions :
Parameters : unsigned *R, int n
Return : [void]
***************************************************************/
{
register int rowsize;
register unsigned mask;
register unsigned *rowj;
register unsigned *rp;
register unsigned *rend;
register unsigned *ccol;
register unsigned *relend;
register unsigned *cword;
register unsigned *rowi;
rowsize = SIZE_IN_INT( n );
relend = R + n*rowsize;
cword = R;
mask = 1;
rowi = R;
while( rowi < relend )
{
ccol = cword;
rowj = R;
while( rowj < relend )
{
if( *ccol & mask )
{
rp = rowi;
rend = rowj + rowsize;
while( rowj < rend ) *rowj++ |= *rp++;
}
else
{
rowj += rowsize;
}
ccol += rowsize;
} /* End of while( rowj < relend ) */
mask <<= 1;
if( mask == 0 )
{
mask = 1;
cword++;
}
rowi += rowsize;
} /* End of while( rowi < relend ) */
} /******* End of transitive_closure( unsigned *R, int n ) ***/
void reflexive_transitive_closure( unsigned *R, int n )
/***************************************************************
Description : transitive_closure()
Concepts :
Use Global Variable:
Use Functions : void transitive_closure( unsigned *R, int n );
| this file
Parameters : unsigned *R, int n
Return : [void]
***************************************************************/
{
register int rowsize;
register unsigned mask;
register unsigned *rp;
register unsigned *relend;
transitive_closure( R, n );
rowsize = SIZE_IN_INT( n );
relend = R + n*rowsize;
mask = 1;
rp = R;
while( rp < relend )
{
*rp |= mask;
mask <<= 1;
if( mask == 0 )
{
mask = 1;
rp++;
}
rp += rowsize;
} /* End of while( rp < relend ) */
} /******* End of reflexive_transitive_closure( unsigned *R, int n ) ***/
#endif /* __NO_COMPILE */
/***************** END OF FILE WARSHALL.C ********************/
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